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Periodic Table of Elements

Cf - Californium

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Nuclides / Isotopes

Nuc-
lide
Atomic
Mass
NNAbun
%
SpinHalf LifeDMDTBR
%
Decay
Energy
(MeV)
Cf237237.062139Syn 2.1s    
Cf238238.061140Syn0+21msSF <25 
Cf239239.063141Syn 39sαCm235>507.810
 39s εBk239 3.900
Cf240240.062142Syn0+1.06mαCm236~1007.719
Cf241241.064143Syn 3.78m εBk241~753.300
 3.78mαCm237~257.660
Cf242242.0637144Syn0+3.49mαCm238 7.516
Cf243243.066145Syn1/2+10.7m εBk243~862.220
 10.7mαCm239~147.390
Cf244244.066146Syn0+19.4mαCm240 7.329
Cf245245.068147Syn5/2+45m εBk245641.569
 45mαCm241367.256
Cf246246.0688148Syn0+35.7h εBk246<0.00050.120
 35.7hSF 0.0002 
 35.7hαCm242 6.862
Cf247247.071149Syn7/2+3.11h εBk24799.970.646
 3.11hαCm2430.046.527
Cf248248.0722150Syn0+333.5dSF 0.0029 
 333.5dαCm244 6.361
Cf249249.0748151Syn9/2-351ySF 5.2E -7 
 351yαCm245 6.295
Cf250250.0764152Syn0+13.08yαCm24699.926.128
 13.08ySF 0.08 
Cf251251.0796153Syn1/2+898yαCm247 6.176
Cf252252.0816154Syn0+2.645yαCm24896.916.217
 2.645ySF 3.09 
Cf253253.0851155Syn7/2+17.81d β-Es25399.690.285
 17.81dαCm2490.316.124
Cf254254.0873156Syn0+60.5dSF 99.69 
 60.5dαCm2500.315.926
Cf255255.091157Syn9/2+85m β-Es255 0.700
Cf256256.093158Syn0+12.3m β-Es256<1 
 12.3mαCm252~1.0E -65.600
NuclidePotential Parent Nuclides
Cf237None known
Cf238None known
Cf239Fm243 (Syn)
Cf240None known
Cf241Cm237 (Syn) Fm245 (Syn)
Cf242Es242 (Syn) Fm246 (Syn)
Cf243Es243 (Syn) Fm247 (Syn)
Cf244Es244 (Syn) Fm248 (Syn)
Cf245Es245 (Syn) Fm249 (Syn)
Cf246Es246 (Syn) Fm250 (Syn)
Cf247Es247 (Syn) Fm251 (Syn)
Cf248Bk248m (Syn) Es248 (Syn) Fm252 (Syn)
Cf249Bk249 (Syn) Es249 (Syn) Fm253 (Syn)
Cf250Bk250 (Syn) Es250 (Syn) Es250m (Syn) Fm254 (Syn)
Cf251Bk251 (Syn) Es251 (Syn) Fm255 (Syn)
Cf252Es252 (Syn) Fm256 (Syn)
Cf253Fm257 (Syn)
Cf254Es254 (Syn) Es254m (Syn)
Cf255None known
Cf256None known

Key:

  • NN = Number of Neutrons
  • Abun % = Natural Abundance (as a percentage)
  • Syn = Synthetic Nuclide (does not occur in nature)
  • DM = Decay Mode
    α = Alpha emission
    β- = Beta emission
    β- β- = Double beta decay
    β+ = Positron emission
    ε = Electron Capture
    IT = Isomeric Transition
    N = Neutron emission
    P = Proton emission
    SF = Spontaneous Fission
  • DT = Decays To
  • BR % = Branch Ratio (as a percentage)

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